SKELETEL SYSTEM BONE TISSUE

Question 1

OSTEON

Answer 1

-also known as Haversian System
-structural unit of compact bone
-elongated cylinder

Question 2

LAMELLA

Answer 2

-matrix tube
-reason why compact bone is called LAMELLAR BONE
-collagen fibres and bone salts
-part of COMPACT BONE

Question 3

HAVERSIAN CANAL

Answer 3

-also known as centeral canal runs through osteon
-have small blood vessels and nerve fibres
-part of COMPACT BONE

Question 4

PERFORATING CANALS

Answer 4

-also known as VOLKMANN’S CANALS
-connect blood and nerve supply from medullary cavity to centeral canals
-NOT surrounded by concentric lamellae, but LINED WITH ENDOSTEUM
-part of COMPACT BONE

Question 5

LACUNAE

Answer 5

-osteocytes found here
-CANALICULI (canals) connect each lacunae
-part of COMPACT BONE

Question 6

INTERSTITIAL LAMELLAE

Answer 6

-incomplete lamellae
-part of COMPACT BONE

Question 7

CIRCUMFERENTIAL LAMELLAE

Answer 7

-extend around circumference of diaphysis
-resist twisting of long bone
-part of COMPACT BONE

Question 8

WHEN DOES OSSIFICATION OCCUR?

Answer 8

1. initial formation of bones
2. growth of bone during development
3. remodelling of bone
4. bone repair

Question 9

FACTORS AFFECTING BONE GROWTH

Answer 9

1. minerals
2. vitamins
3. hormones

Question 10

MESENCHYMAL

Answer 10

-stem cells found in bone marrow for connective and skeletal tissue developement

Question 11

OSTEOID

Answer 11

-organic portion of bone matrix that forms

Question 12

HEMATOPOIETIC TISSUE

Answer 12

-tissue where new blood cells are formed